1 //===-- VEMCInstLower.cpp - Convert VE MachineInstr to MCInst -------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file contains code to lower VE MachineInstrs to their corresponding 10 // MCInst records. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "MCTargetDesc/VEMCExpr.h" 15 #include "VE.h" 16 #include "llvm/CodeGen/AsmPrinter.h" 17 #include "llvm/CodeGen/MachineFunction.h" 18 #include "llvm/CodeGen/MachineInstr.h" 19 #include "llvm/CodeGen/MachineOperand.h" 20 #include "llvm/IR/Mangler.h" 21 #include "llvm/MC/MCAsmInfo.h" 22 #include "llvm/MC/MCContext.h" 23 #include "llvm/MC/MCExpr.h" 24 #include "llvm/MC/MCInst.h" 25 26 using namespace llvm; 27 28 static MCOperand LowerSymbolOperand(const MachineInstr *MI, 29 const MachineOperand &MO, 30 const MCSymbol *Symbol, AsmPrinter &AP) { 31 VEMCExpr::VariantKind Kind = (VEMCExpr::VariantKind)MO.getTargetFlags(); 32 33 const MCExpr *Expr = MCSymbolRefExpr::create(Symbol, AP.OutContext); 34 // Add offset iff MO is not jump table info or machine basic block. 35 if (!MO.isJTI() && !MO.isMBB() && MO.getOffset()) 36 Expr = MCBinaryExpr::createAdd( 37 Expr, MCConstantExpr::create(MO.getOffset(), AP.OutContext), 38 AP.OutContext); 39 Expr = VEMCExpr::create(Kind, Expr, AP.OutContext); 40 return MCOperand::createExpr(Expr); 41 } 42 43 static MCOperand LowerOperand(const MachineInstr *MI, const MachineOperand &MO, 44 AsmPrinter &AP) { 45 switch (MO.getType()) { 46 default: 47 report_fatal_error("unsupported operand type"); 48 49 case MachineOperand::MO_Register: 50 if (MO.isImplicit()) 51 break; 52 return MCOperand::createReg(MO.getReg()); 53 54 case MachineOperand::MO_ExternalSymbol: 55 return LowerSymbolOperand( 56 MI, MO, AP.GetExternalSymbolSymbol(MO.getSymbolName()), AP); 57 case MachineOperand::MO_GlobalAddress: 58 return LowerSymbolOperand(MI, MO, AP.getSymbol(MO.getGlobal()), AP); 59 case MachineOperand::MO_Immediate: 60 return MCOperand::createImm(MO.getImm()); 61 62 case MachineOperand::MO_MachineBasicBlock: 63 return LowerSymbolOperand(MI, MO, MO.getMBB()->getSymbol(), AP); 64 65 case MachineOperand::MO_RegisterMask: 66 break; 67 } 68 return MCOperand(); 69 } 70 71 void llvm::LowerVEMachineInstrToMCInst(const MachineInstr *MI, MCInst &OutMI, 72 AsmPrinter &AP) { 73 OutMI.setOpcode(MI->getOpcode()); 74 75 for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { 76 const MachineOperand &MO = MI->getOperand(i); 77 MCOperand MCOp = LowerOperand(MI, MO, AP); 78 79 if (MCOp.isValid()) 80 OutMI.addOperand(MCOp); 81 } 82 } 83